package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioClient minioClient;

    @Autowired
    private MinioProperties minioProperties;

    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {
        // 1.判断桶是否存在
        boolean bucketExists = minioClient.bucketExists(BucketExistsArgs
                .builder()
                .bucket(minioProperties.getBucketName())
                .build());
        // 2.桶不存在则创建
        if (!bucketExists) {
            minioClient.makeBucket(MakeBucketArgs.builder()
                    .bucket(minioProperties.getBucketName())
                    .build());
            // 3.设置桶权限
            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder()
                    .bucket(minioProperties.getBucketName())
                    .config(createBucketPolicyConfig(minioProperties.getBucketName()))
                    .build());
        }
        // 文件名
        String filename = new SimpleDateFormat("yyyyMMdd")
                .format(new Date()) + "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();
        // 4.上传文件
        //minioClient.uploadObject()
        minioClient.putObject(PutObjectArgs.builder()
                .bucket(minioProperties.getBucketName())
                // 文件输入流，文件总大小，文件分块大小
                .stream(file.getInputStream(), file.getSize(), -1)
                // 上传文件的类型
                .contentType(file.getContentType())
                // 文件的名字
                .object(filename).build());
        // 5.文件的url
        String url = String.join("/",
                minioProperties.getEndpoint(),
                minioProperties.getBucketName(),
                filename);
        return url;
    }

    private String createBucketPolicyConfig(String bucketName){
         //设置hello-minio桶的访问权限
        return   """
                {
                  "Statement" : [ {
                    "Action" : "s3:GetObject",
                    "Effect" : "Allow",
                    "Principal" : "*",
                    "Resource" : "arn:aws:s3:::%s/*"
                  } ],
                  "Version" : "2024-6-26"
                }""".formatted(bucketName);
    }
}
